Malicious PDF — malware analysis report

Static analysis result for SHA-256 39a5b36dff15e662…

MALICIOUS

PDF

54.1 KB Created: 2020-08-14 21:48:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c7e29ce7572a719b78a07ced0177834 SHA-1: 9b51837de6898e61c68c74e46b472203825eee96 SHA-256: 39a5b36dff15e662db09f1b2758bf7014cd211508e41bd62db534ae153022464
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'snare drum sheet music pdf' and the malicious URL, suggesting a lure. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm strategy to obscure the ultimate malicious destination.

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=snare+drum+sheet+music+pdf
    • http://files.syntheticephemera.com/uploads/1/3/0/8/130814980/gigamad-pubeporef-vowuzaxev-muwumexedumonuz.pdf
    • http://xevareliz.lampleylaw.com/uploads/1/3/0/8/130813042/4160275.pdf
    • http://files.issl.space/uploads/1/3/0/7/130738700/7d4db367e38.pdf
    • http://votebu.holisticatrescue.org/uploads/1/3/0/7/130740178/3160943.pdf
    • http://files.gregorybarbera.com/uploads/1/3/0/8/130873932/ab1723413a4a13.pdf
    • https://cdn.shopify.com/s/files/1/0428/5572/7260/files/60414371359.pdf
    • https://cdn.shopify.com/s/files/1/0430/2897/1681/files/fovumetizopaluvujapi.pdf
    • https://cdn.shopify.com/s/files/1/0439/2475/0491/files/31438674834.pdf
    • https://cdn.shopify.com/s/files/1/0433/3430/3912/files/avebury_map.pdf
    • https://cdn.shopify.com/s/files/1/0443/0485/9292/files/jifagutasir.pdf
    • https://cdn.shopify.com/s/files/1/0429/8375/1831/files/90265566119.pdf
    • https://cdn.shopify.com/s/files/1/0428/7699/3702/files/d_link_dir_655_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/4659/0872/files/1._75_in_fraction.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000096a0.bin
5f28c7994a0ac2101d451d47b282a5c5933f2690f06b71ae1c80851b62e8c1e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96A0 5464 bytes
font_01_sfnt_off0000a8fc.bin
01169c2d937833cd11569286c6e5a9a48114c4088811c01de1429c1072a50f52		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA8FC 10120 bytes

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